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Seneca Coal Company <br />MSHA I.D. OS-00304 <br />Highwall Mining Addendum <br />March 15, 2004 <br />11. No blasting shall occur within 1,500 ft of the highwall mining operation. If <br />exceptions to this procedure are necessary, highwall mining operations will cease <br />until the blast is complete and the highwall has been re-examined for any damage <br />caused by the blast. <br />12. Adequate illumination shall be provided for work areas after dark per 30 CFR <br />77.1504(e). <br />D. Description of Operations <br />1. Operators position relative to highwall opening: <br />The operator of the highwall mining system will be stationed in a cab located 50-60 <br />ft from the miner entry. While the groundman adds or removes push-beam, he will <br />be positioned on the mainframe walkway with both the 16-foot cable reel and the <br />protective canopy between him and the front of the launch vehicle and highwall. <br />No person should, when practicable, be stationed in direct line with a hole during <br />operation. The typical entry layout is shown in the Attachments in Platte 1 and 2. <br />2. Coal discharge and maximum clearance: <br />The coal will be discharged from the stacker conveyor. A dozer or loader <br />maintains the pit floor coal stockpile. Minimum pit width during miner operations <br />will be 75 feet <br />3. Push-beam changing and handling: <br />Push-beams aze loaded onto the table of the main frame using afront-end loader <br />with a fork attachment. Push-beams are added by a hydraulically powered <br />mechanical table referred to as a push-beam transfer mechanism (PTM). Once <br />positioned, groundman will climb onto the mainframe walkway to observe the <br />powerhead as it moves forward and latches to the newly positioned push beam. <br />Then the groundman will walk down this push-beam to the front of the main frame, <br />where the newly installed push-beam is shoved by the powerhead assembly and <br />latched to the stream ofpush-beams, which aze running underground. Once <br />latched, the groundman will place locking pins in each side of the push-beam and <br />will then clirpb off the main frame. The groundman must insure the boarding <br />ladders to the main frame are in good condition, and that walkways are free from <br />tripping or stumbling hazards. Extra caution will be needed during periods of <br />inclement weather when push-beams are wet or slick. After an entry has been <br />completed, the miner and push-beams will be pulled from the hole, and removed <br />one-by-one. The machine will then be repositioned over the next entry using its <br />crawlers. <br />4. Coal Delivery <br />